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MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C++内核技术
...先看一个MongoDB服务器的top命令结果：
shell> top -p $(pidof mongod)
Mem: 32872124k total, 30065320k used, 2806804k free, 245020k buffers
Swap: 2097144k total, 100k used, 2097044k free, 26482048k cached
VIRT RES SHR %MEM
1892g 21g 21g 69.6
这台MongoDB服务器...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C++内核技术
...先看一个MongoDB服务器的top命令结果：
shell> top -p $(pidof mongod)
Mem: 32872124k total, 30065320k used, 2806804k free, 245020k buffers
Swap: 2097144k total, 100k used, 2097044k free, 26482048k cached
VIRT RES SHR %MEM
1892g 21g 21g 69.6
这台MongoDB服务器...
How to get only the last part of a path in Python?
..., then os.path.basename:
>>> os.path.basename(os.path.normpath('/folderA/folderB/folderC/folderD/'))
'folderD'
The first strips off any trailing slashes, the second gives you the last part of the path. Using only basename gives everything after the last slash, which in this case is ''.
...
IF… OR IF… in a windows batch file
...FINED as a final test - no need to use delayed expansion.
FOR ..... DO (
set "TRUE="
IF cond1 set TRUE=1
IF cond2 set TRUE=1
IF defined TRUE (
...
) else (
...
)
)
You could add the ELSE IF logic that arasmussen uses on the grounds that it might perform a wee bit faster if the 1...
Shards and replicas in Elasticsearch
... | | 3R | | 4 | | 5 |
|____| |____| |____| |____| |____|
With a setup like this, if a node goes down, you still have the whole index. The replica shards will automatically become primaries and the cluster will work properly despite the node failure, as follows:
____ ____ ____ _...
How do I remove blank elements from an array?
I have the following array
20 Answers
20
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How to determine the number of days in a month in SQL Server?
...act-SQL) to get the number of days in the month.
DECLARE @ADate DATETIME
SET @ADate = GETDATE()
SELECT DAY(EOMONTH(@ADate)) AS DaysInMonth
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f...
Why am I getting an OPTIONS request instead of a GET request?
...sing
application/xml or text/xml, then the request is preflighted.
It sets custom headers in the request (e.g. the request uses a header such as
X-PINGOTHER)
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Fix warning “Capturing [an object] strongly in this block is likely to lead to a retain cycle” in AR
...:
My understanding of the documentation says that using keyword block and setting the variable to nil after using it inside the block should be ok, but it still shows the warning.
__block ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL:...
[request setCompletionBlock:^{
NSDictio...
What does the M stand for in C# Decimal literal notation?
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